In a small bowl, combine all sauce ingredients. Mix well. Set aside.
Heat oil in medium skillet or wok over medium heat.
In a medium bowl combine all batter ingredients. Mix well until smooth.
Toss prepared shrimp in batter. Turn to coat well.
Remove shrimp, 1 or 2 at a time, from batter, allowing excess to drip off, and add to hot skillet. Add as many shrimp as will fit comfortably in skillet. Do not crowd. Cook for 2 - 3 minutes on each side.
When done remove from oil and place on a paper towel-covered plate to drain. Keep warm.
Repeat with any remaining shrimp.
When all shrimp are cooked, place into a sealable container. Add about 1/2 of the prepared sauce. Seal and toss to coat. Add more sauce if desired.
Line 1 or more large martini glasses (or small plates or bowls, if you prefer) with 2 to 3 leaves lettuce each.
Spoon shrimp onto lettuce.
Sprinkle scallions onto shrimp.
Serve hot.